Modular box frame



FIG. 1 is a partial perspective view of a modular box frame according to an embodiment of the invention. Dashed lines indicate additional components and/or connectivity structure that are not part of the claimed design; and,

FIG. 2 is a perspective view of a modular box frame according to a further embodiment of the invention. Dashed lines indicate additional components and/or connectivity structure that are not part of the claimed design.

Due to the symmetry of the design, each of these perspective views are the same from both ends and all sides of the claimed invention. The perspective views of FIGS. 1-2 fully and completely disclose the appearance of the modular box frame design. 

We claim the ornamental design for modular box frame, as shown and described. 